EP0704770B1 - Verfahren zum Unterstützen der Bebilderung einer Druckform und Druckform zur Verwendung in einem der Verfahren - Google Patents
Verfahren zum Unterstützen der Bebilderung einer Druckform und Druckform zur Verwendung in einem der Verfahren Download PDFInfo
- Publication number
- EP0704770B1 EP0704770B1 EP95114848A EP95114848A EP0704770B1 EP 0704770 B1 EP0704770 B1 EP 0704770B1 EP 95114848 A EP95114848 A EP 95114848A EP 95114848 A EP95114848 A EP 95114848A EP 0704770 B1 EP0704770 B1 EP 0704770B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- layer
- ferroelectric
- electrode
- image
- light
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000000034 method Methods 0.000 title claims description 16
- 238000004519 manufacturing process Methods 0.000 title claims 3
- 230000000694 effects Effects 0.000 claims description 31
- 239000002800 charge carrier Substances 0.000 claims description 18
- 231100000289 photo-effect Toxicity 0.000 claims description 17
- 230000005684 electric field Effects 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 6
- 150000002500 ions Chemical class 0.000 claims description 5
- 230000005855 radiation Effects 0.000 claims description 5
- 230000005670 electromagnetic radiation Effects 0.000 claims description 3
- 238000002513 implantation Methods 0.000 claims 1
- 230000001960 triggered effect Effects 0.000 claims 1
- 239000010410 layer Substances 0.000 description 95
- 238000003384 imaging method Methods 0.000 description 13
- 230000010287 polarization Effects 0.000 description 9
- 239000011248 coating agent Substances 0.000 description 6
- 238000000576 coating method Methods 0.000 description 6
- 229910052451 lead zirconate titanate Inorganic materials 0.000 description 3
- 238000005215 recombination Methods 0.000 description 3
- 230000006798 recombination Effects 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000001678 irradiating effect Effects 0.000 description 2
- HFGPZNIAWCZYJU-UHFFFAOYSA-N lead zirconate titanate Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ti+4].[Zr+4].[Pb+2] HFGPZNIAWCZYJU-UHFFFAOYSA-N 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 239000002033 PVDF binder Substances 0.000 description 1
- 206010034972 Photosensitivity reaction Diseases 0.000 description 1
- 229910006404 SnO 2 Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000003574 free electron Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- 229910003437 indium oxide Inorganic materials 0.000 description 1
- PJXISJQVUVHSOJ-UHFFFAOYSA-N indium(iii) oxide Chemical compound [O-2].[O-2].[O-2].[In+3].[In+3] PJXISJQVUVHSOJ-UHFFFAOYSA-N 0.000 description 1
- 229910052746 lanthanum Inorganic materials 0.000 description 1
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 description 1
- 230000028161 membrane depolarization Effects 0.000 description 1
- 229910052754 neon Inorganic materials 0.000 description 1
- 229910052756 noble gas Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000036211 photosensitivity Effects 0.000 description 1
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 1
- 229910001887 tin oxide Inorganic materials 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
- B41C1/00—Forme preparation
- B41C1/10—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme
- B41C1/1058—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme by providing a magnetic pattern, a ferroelectric pattern or a semiconductive pattern, e.g. by electrophotography
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G13/00—Electrographic processes using a charge pattern
- G03G13/056—Electrographic processes using a charge pattern using internal polarisation
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G13/00—Electrographic processes using a charge pattern
- G03G13/26—Electrographic processes using a charge pattern for the production of printing plates for non-xerographic printing processes
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G5/00—Recording members for original recording by exposure, e.g. to light, to heat, to electrons; Manufacture thereof; Selection of materials therefor
- G03G5/02—Charge-receiving layers
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G5/00—Recording members for original recording by exposure, e.g. to light, to heat, to electrons; Manufacture thereof; Selection of materials therefor
- G03G5/02—Charge-receiving layers
- G03G5/022—Layers for surface-deformation imaging, e.g. frost imaging
Definitions
- the invention relates to methods for supporting imaging a printing form with at least a first layer that a Photo effect, d. H. the photoferroelectric effect, showing Ferroelectric contains, being by irradiation with light above the Cutoff frequency of the ferroelectric in the ferroelectric free charge carriers are generated.
- the invention also relates to a process in which the free charge carriers in a non-ferroelectric layer that is attached to one imaging ferroelectric layer adjacent, this layer only the charge generating layer is composed of several layers Is photoconductor and therefore not a photoconductor according to the usual Represents definition.
- the invention also relates to a Printing form, whose ferroelectric layer to reinforce the photoferroelectric effect is specially designed.
- a printing form which is a thin one Disc or plate with a ferroelectric material and a photoconductive coating is formed on one of its surfaces.
- a first in terms of area Arranged electrode on the photoconductive coating is a second Electrode applied.
- the photoelectric layer acts as a switch. At least one of the two electrodes is removable. At least that Electrode on the photoconductive coating is translucent. If on the photoconductive surface of the printing form focuses an optical image and at the same time an electrical voltage to the two electrodes is applied, the ferroelectric can be polarized imagewise.
- the surface of the printing form can also be radiated through a bundled light beam, for example a laser beam, be scanned. If one is connected to both electrodes at the same time DC voltage is applied in the bright areas on the photoconductive surface, d. H. the imagewise exposed areas, the specific electrical resistance of the photoconductive coating is low. Therefore, the DC voltage mainly affects those areas of the Ferroelectric one, which under the bright image areas of the photoconductive coating. The specific electrical resistance the photoconductive coating remains in the dark areas of the image high. This makes a ferroelectric in the ferroelectric Polarization is only induced in those areas that are bright Correspond to image areas.
- a printing method using a pyroelectric film known.
- the pyroelectric film will be there also ferroelectric materials, e.g. B. lead zirconate titanate or Polyvinylidene fluoride used.
- ferroelectric materials e.g. B. lead zirconate titanate or Polyvinylidene fluoride used.
- Such a ferroelectric is for example, placed between two planar electrodes, one of which one is translucent. One is between the two electrodes Voltage is applied, the ferroelectric film is corresponding to an in image patterns to be generated selectively by electromagnetic radiation warmed up. Due to the areal application of the electric field and that Selective heating makes the ferroelectric permanent polarized. The complex, not always easy to control exploited photothermal effect.
- JP-A-63 220 178 and JP-A-58 139 561 Further relevant methods or printing forms with a ferroelectric layer and a further photoconductive layer are known from JP-A-63 220 178 and JP-A-58 139 561.
- the invention uses the photo effect in a ferroelectric layer, d. H. the photoferroelectric effect is used. Instead of photoferroelectric effect can also be the photo effect in one Ferroelectric adjacent layer can be exploited, which in turn however, in contrast to those known from DT 25 30 290 A1 photoconductive layers only from a functional component of a such a photoconductive layer, which alone does not represents functional photoconductor.
- a ferroelectric can be used Imaging other than light that exceeds the cutoff frequency, additionally with light from other, even lower frequencies irradiate to by increasing the temperature of the ferroelectric material, d. H. due to the photothermal effect, the polarization of the Support ferroelectric.
- a printing form (FIG. 1) has a ferroelectric layer 1.
- Layer 1 consists for example of lead zirconate titanate (PZT) or of lead lanthanum zirconate titanate (PLZT) or of a ceramic containing a ferroelectric.
- the underside of layer 1 is covered over its entire area by an electrode 2.
- layer 1 is also covered by an all-over electrode 3.
- the electrode 3 is translucent and removable; it consists, for example, of a transparent film coated with indium oxide (In 2 O 3 ) or tin oxide (SnO 2 ).
- An external voltage U ext generated by a voltage source 4 is present between the electrodes 2 and 3. After the irradiation, the electrode 3 is removed again.
- the layer 1 through the translucent electrode 3 with light, for. B. near UV light, irradiated.
- This light has sufficient energy, ie its frequency lies above a material-specific cut-off frequency in order to produce the photo effect (photoferroelectric effect) in the ferroelectric layer 1.
- the photoferroelectric effect is based on the same physical principle as, for example, the photo effect in pn junctions of semiconductors. In the case of these semiconductors, an electrical field is created in the pn junction by diffusion of the excess charge carriers, which produces a zone free of charge carriers, the so-called barrier layer. If new charge carriers are generated in this zone by means of the photo effect, photoconductivity arises.
- the charge carriers migrate in accordance with the effect of the field and produce a stable, permanent space charge field. Its strength depends on the number of charge carriers generated by the photo effect and therefore on the duration and intensity of the irradiation, provided that the cutoff frequency for the photo effect is exceeded.
- the space charge field is superimposed on the applied field and supports the polarization of the ferroelectric, ie the coercive field strength required for reorienting the ferroelectric domains is reduced by the space charge field.
- Fig. 2 is another one Layer 6 containing ferroelectric is present.
- the ferroelectric for layer 6 is chosen so that its coercive field strength is above Coercive field strength of layer 1 is. Therefore, if between the Electrodes 2 and 3 through the voltage source 4 an electric field is applied, the strength of which is above the coercivity of the Layer 1 but below the coercive force of Layer 6 this acts as long as the printing form is not irradiated with light Isolator and prevents polarization. Only when layer 6 is irradiated with light whose frequency is above that Photo-effect cut-off frequency of the ferroelectric layer 6 is this in accordance with the process shown in Fig. 1 or electrically conductive polarizable and also allows the polarization of layer 1.
- the Printing form can then be exposed imagewise with the light source 5. The prerequisite for this is that layer 1 is transparent to light Frequency is.
- a charge generation layer (charge generator layer) is used.
- charge generation layer charge generator layer
- Such layers are known from organic multilayer photoconductors (multilayer OPC), which are usually from a very thin charge generator layer layer) and a relatively thick charge transport layer layer) are built up. This ensures that as many as possible Charge effect generated before the recombination in the for Recombination insensitive transport layer can be pulled. in the Ferroelectric is this "charge transport layer" which immediately the surface adjoining charge carrier-free zone.
- layer 7 is imagewise irradiated with light of a frequency by the light source 5, which is sufficient to produce the photo effect in layer 7 charge carriers are generated there, provided that layer 1 is for this Translucent light.
- the electrode 3 When the electrode 3 is at a certain potential lies opposite the electrode 2, they migrate in the layer 7 arising free charge carriers due to the electric field in Direction to the electrode 3 into the layer 1.
- the field strength is dependent on the number of charge carriers generated and the Potential between electrode 3 and electrode 2. Exceeds the the resulting field strength is the coercive field strength of layer 1, see above the image is polarized.
- the frequency required for the photo effect in layer 7 is still above the one required for the photoferroelectric effect in layer 1
- the cutoff frequency lies because of the photo effect in the layer 7 due to the photoferroelectric effect in layer 1 is supported. If the printing form passes through the electrode 3 instead of from above and layer 1 from below directly on layer 7 is irradiated, the ferroelectric layer 1 can also be polarized are, in which case the layer 1 and the electrode 3 are not must be translucent.
- ferroelectric layers instead of one single layer 1 several, showing the photoferroelectric effect Provide ferroelectric layers.
- Ferroelectric layers are present, which - at least in the Frequency of the incident light - the photoferroelectric effect do not show.
- the ferroelectric layers have one, for example Multi-layer structure, as is known per se with photo elements.
- the layers can be selected so that a first one of them has strong photoferroelectric effect for the incident light and another high conductivity for those from the first layer generated electrons or shows good polarizability.
- Layer 1 is not necessarily translucent. It’s enough too off when the photons are already in the electrode 3 area or area above the electrode 2, if the layer is irradiated from below and the electrode 2 is translucent is absorbed to generate free electrons.
- a printing form is irradiated with the ferroelectric layer 1 and the electrode 2 covering the entire surface thereof by a light source 8.
- a transparent imaging electrode 9 rests on the top of the layer 1.
- a voltage U ext is present between the electrode 2 and the imaging electrode 9 through the voltage source 4.
- the risk of electrical arcing between the individual imaging electrodes 9 is reduced because of the lower voltage.
- a higher image resolution can be achieved in that the imaging electrodes 9 can be combined on a smaller area at a lower voltage.
- FIG. 5 Another printing form (FIG. 5) is first polarized over the entire surface by applying a voltage U ext between the electrode 2 and the removable electrode 3 (not shown here). After removal of the electrode 3, the printing form is irradiated imagewise so that a sufficiently high conductivity arises over the entire thickness of the polarized layer 1, ie the photoferroelectric effect is exploited by irradiating the layer 1 with light above the limit frequency required for this effect .
- the prerequisite for this is that layer 1 is so thin that the charge carriers generated inside can migrate from the upper boundary layer to the lower one before recombination takes place. As a result, the layer 1 becomes sufficiently conductive so that the free charges present on its surface 10, which had been generated during polarization, flow out through the layer 1 onto the electrode 2. Accordingly, the printing form is depolarized at the locations irradiated by the radiation source 5. In contrast to the exemplary embodiments shown in FIGS. 1-4, a negative image is produced.
- the generation can of the image through the known photothermal effect are supported by the radiation source 5, 8 in addition to that for the photoferroelectric effect required light of sufficient energy it also emits less energy light, which heats layer 1 becomes.
- the limit energy required for the photoferroelectric effect Radiation can be induced by implanting foreign atoms in the Lower boundary layer.
- photosensitivity be moved far into visible space if layer 1 was previously at least on the side from which the light enters them with Noble gas ions (Ne, He or Ar ions) in combination with Al or Cr ions were implanted.
- the invention provides a printing form with a ferroelectric Layer 1 created using the photoferroelectric Effect in layer 1 or the photo effect in one to layer 1 adjacent layer 7, which is neither ferroelectric, nor the function of a photoconductor, the imaging of layer 1 by polarization or depolarization is supported.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Electrophotography Using Other Than Carlson'S Method (AREA)
- Manufacture Or Reproduction Of Printing Formes (AREA)
- Photoreceptors In Electrophotography (AREA)
- Thermal Transfer Or Thermal Recording In General (AREA)
Description
- Fig. 1
- eine Druckform mit einer ferroelektrischen Schicht, die beidseitig ganzflächig von Elektroden bedeckt ist,
- Fig. 2
- eine Druckform gemäß Fig. 1 mit einer weiteren ferroelektrischen Schicht,
- Fig. 3
- eine Druckform, die anstelle einer der beiden Elektroden eine Schicht zur Erzeugung des Photoeffekts aufweist,
- Fig. 4
- eine Druckform mit einer nur einseitig ganzflächig von einer Elektrode bedeckten ferroelektrischen Schicht und einer Bebilderungs-Elektrode auf der anderen Seite und
- Fig. 5
- eine Druckform mit einer ferroelektrischen Schicht, die nur einseitig von einer Elektrode bedeckt ist.
Claims (9)
- Verfahren zur Bebilderung einer Druckform mit mindestens einer ersten Schicht (1) aus einem Ferroelektrikum, dadurch gekennzeichnet, daß vor und/oder während der Polarisation durch Bestrahlung der mindestens ersten Schicht (1) und/oder einer weiteren Schicht (6, 7) Ladungsträger für die erste Schicht (1) zur Verfügung gestellt werden, die durch den photoelektrischen Effekt freigesetzt werden oder wurden, in der Weise, daß die erste Schicht und/oder die weitere Schicht (6, 7) mit einer Strahlung mit einer materialspezifischen Grenzfrequenz oder einer darüberliegenden Frequenz bestrahlt werden, durch die der photoelektrische Effekt ausgelöst wird.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die erste Schicht (1) mit elektromagnetischer Strahlung mit Frequenzen auch unterhalb der Grenzfrequenz bestrahlt wird, wodurch die Temperatur in der Schicht (1) erhöht wird.
- Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die erste Schicht (1) zwischen eine erste (2) und eine zweite, die erste Schicht (1) jeweils ganzflächig bedeckende Elektrode (3) gebracht wird, wobei mindestens die zweite Elektrode (3) lichtdurchlässig ist, und daß bildmäßig Licht auf die erste Schicht (1) eingestrahlt wird, während gleichzeitig ein elektrisches Feld angelegt wird, dessen Feldstärke unterhalb der Koerzitivfeldstärke (EC) der ersten Schicht (1) im unbestrahlten Zustand liegt.
- Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die erste Schicht (1) zwischen eine sie ganzflächig bedeckende und lichtdurchlässige erste Elektrode (3) und eine zweite ferroelektrische Schicht (6) gebracht wird, auf die ihrerseits eine zweite, diese ganzflächig bedeckende Elektrode (2) gebracht wird, daß die zweite Schicht (6) eine höhere Koerzitivfeldstärke als die erste Schicht hat und daß die zweite Schicht (6) beim Bestrahlen mit Licht oberhalb von deren Grenzfrequenz freie Ladungsträger erzeugt, so daß sie leitfähig wird, daß gleichzeitig ein elektrisches Feld zwischen den Elektroden (2, 3) angelegt wird, deren Feldstärke oberhalb der Koerzitivfeldstärke der ersten Schicht (1) im unbestrahlten Zustand, aber unterhalb der Koerzitivfeldstärke der zweiten Schicht (6) liegt, so daß, wenn die zweite Schicht (6) leitfähig wird, die erste Schicht (1) polarisiert wird.
- Verfahren, insbesondere nach Anspruch 1, zum Unterstützen der Bebilderung einer Druckform mit mindestens einer ersten ferroelektrischen Schicht (1), die zwischen eine durchsichtige Elektrode (3) und eine den Photo-Effekt aufweisende nicht-ferroelektrische zweite Schicht (7) gebracht wird, deren Grenzfrequenz zur Erzeugung des Photo-Effekts unterhalb der Grenzfrequenz zur Erzeugung des photoferroelektrischen Effekts der ersten Schicht (1) liegt, wobei durch bildmäßiges Bestrahlen mit Licht, dessen Frequenz oberhalb der Grenzfrequenz der zweiten Schicht (7) und unterhalb der Grenzfrequenz der ersten Schicht (1) liegt, Ladungsträger in der zweiten Schicht (7) erzeugt werden, die in die erste Schicht (1) wandern und diese bildmäßig polarisieren.
- Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die erste Schicht (1) zwischen eine erste, sie ganzflächig bedeckende Elektrode (2) und eine zweite Bebilderungs-Elektrode (9) oder eine Mehrzahl von Bebilderungs-Elektroden (9) gebracht wird, daß zwischen der ersten Elektrode (2) und der Bebilderungs-Elektrode (9) oder den Bebilderungs-Elektroden (9) eine Feldstärke in der ersten Schicht (1) erzeugt wird, die unterhalb der Koerzitiv-Feldstärke der ersten Schicht (1) im unbestrahlten Zustand liegt und daß diese durch ganzflächiges Bestrahlen der ersten Schicht (1) bildmäßig überschritten wird.
- Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die erste Schicht (1) zwischen zwei sie vollflächig bedeckende Elektroden (2, 3) gebracht wird und in einem ersten Schritt als ganze polarisiert wird, daß anschließend eine der Elektroden (2, 3) von der Oberfläche der ersten Schicht (1) entfernt wird und daß die erste Schicht (1) von dieser Oberfläche bildmäßig mit Licht bestrahlt wird, dessen Frequenz oberhalb der für den photoferroelektrischen Effekt erforderlichen Grenzfrequenz liegt, wodurch die erste Schicht (1) bildmäßig depolarisiert wird.
- Verfahren nach einem der Ansprüche 3, 4, 6 und 7, dadurch gekennzeichnet, daß anstelle der zweiten Elektrode (3) ein dielektrisches Plättchen mit Ladungsträgern oder vorher, insbesondere durch Corona-Entladung, aufgebrachte Ladungsträger verwendet werden.
- Druckform zur Verwendung in einem der Verfahren nach einem der Ansprüche 1 bis 8, mit mindestens einer ersten Schicht (1) aus einem Ferroelektrikum und/oder einer weiteren Schicht (6, 7), die bei Bestrahlung mit einer materialspezifischen Grenzfrequenz oder einer darüberliegenden Frequenz den photoferroelektrischen Effekt auslöst und Ladungsträger für die erste Schicht (1) zur Verfügung stellt, dadurch gekennzeichnet, daß die erste Schicht (1) wenigstens an der Oberfläche durch Implantation chemisch aktiver Ionen und chemisch-inerter Ionen angereichert ist, die bei der Bestrahlung der Lichtquelle (5, 8) zugewandt ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4434766A DE4434766A1 (de) | 1994-09-29 | 1994-09-29 | Verfahren zum Unterstützen der Bebilderung einer Druckform und Druckform zur Verwendung in einem der Verfahren |
DE4434766 | 1994-09-29 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0704770A2 EP0704770A2 (de) | 1996-04-03 |
EP0704770A3 EP0704770A3 (de) | 1997-05-07 |
EP0704770B1 true EP0704770B1 (de) | 2000-02-09 |
Family
ID=6529479
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95114848A Expired - Lifetime EP0704770B1 (de) | 1994-09-29 | 1995-09-21 | Verfahren zum Unterstützen der Bebilderung einer Druckform und Druckform zur Verwendung in einem der Verfahren |
Country Status (5)
Country | Link |
---|---|
US (1) | US5900341A (de) |
EP (1) | EP0704770B1 (de) |
JP (1) | JP2914899B2 (de) |
CA (1) | CA2157810C (de) |
DE (2) | DE4434766A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5927206A (en) * | 1997-12-22 | 1999-07-27 | Eastman Kodak Company | Ferroelectric imaging member and methods of use |
TWI580956B (zh) * | 2015-12-17 | 2017-05-01 | 長庚大學 | 即時二維電位顯像方法 |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA944427A (en) * | 1968-11-21 | 1974-03-26 | Joseph Gaynor | Thermal electret copying process |
US3700436A (en) * | 1969-02-28 | 1972-10-24 | Owens Illinois Inc | Electrode configuration for electrophotography |
US3928031A (en) * | 1970-08-10 | 1975-12-23 | Katsuragawa Denki Kk | Method of electrophotography |
US3899969A (en) * | 1973-08-06 | 1975-08-19 | Minnesota Mining & Mfg | Printing using pyroelectric film |
JPS50115830A (de) * | 1974-02-22 | 1975-09-10 | ||
DE2530290A1 (de) * | 1974-07-08 | 1976-01-22 | Hitachi Ltd | Verfahren und vorrichtung zum kopieren |
JPS57104948A (en) * | 1980-12-23 | 1982-06-30 | Olympus Optical Co Ltd | Multi-sheet copying electrophotographic method |
JPH0629977B2 (ja) * | 1981-06-08 | 1994-04-20 | 株式会社半導体エネルギー研究所 | 電子写真用感光体 |
JPS58139561A (ja) * | 1982-02-15 | 1983-08-18 | Canon Inc | 静電潜像読出し方法 |
JP2581060B2 (ja) * | 1987-03-09 | 1997-02-12 | ミノルタ株式会社 | 潜像形成方法 |
JP2965616B2 (ja) * | 1990-04-17 | 1999-10-18 | 株式会社リコー | 画像記録体及び画像記録方法 |
JPH05224491A (ja) * | 1991-09-25 | 1993-09-03 | Ricoh Co Ltd | 画像記録方法 |
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1994
- 1994-09-29 DE DE4434766A patent/DE4434766A1/de not_active Withdrawn
-
1995
- 1995-09-08 CA CA002157810A patent/CA2157810C/en not_active Expired - Fee Related
- 1995-09-21 EP EP95114848A patent/EP0704770B1/de not_active Expired - Lifetime
- 1995-09-21 DE DE59507775T patent/DE59507775D1/de not_active Expired - Fee Related
- 1995-09-28 JP JP7251585A patent/JP2914899B2/ja not_active Expired - Fee Related
-
1997
- 1997-09-03 US US08/922,742 patent/US5900341A/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
DE4434766A1 (de) | 1996-04-04 |
EP0704770A3 (de) | 1997-05-07 |
JP2914899B2 (ja) | 1999-07-05 |
JPH08123164A (ja) | 1996-05-17 |
US5900341A (en) | 1999-05-04 |
CA2157810A1 (en) | 1996-03-30 |
EP0704770A2 (de) | 1996-04-03 |
CA2157810C (en) | 2000-09-05 |
DE59507775D1 (de) | 2000-03-16 |
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